/*
 * Copyright (c) 2001, 2004, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 *
 *
 *
 *
 */

package com.sun.imageio.plugins.gif;

import java.util.Arrays;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.metadata.IIOMetadataFormat;
import javax.imageio.metadata.IIOMetadataFormatImpl;

public class GIFImageMetadataFormat extends IIOMetadataFormatImpl {

    private static IIOMetadataFormat instance = null;

    private GIFImageMetadataFormat() {
        super(GIFImageMetadata.nativeMetadataFormatName, CHILD_POLICY_SOME);

        // root -> ImageDescriptor
        addElement("ImageDescriptor", GIFImageMetadata.nativeMetadataFormatName, CHILD_POLICY_EMPTY);
        addAttribute("ImageDescriptor", "imageLeftPosition", DATATYPE_INTEGER, true, null, "0", "65535", true, true);
        addAttribute("ImageDescriptor", "imageTopPosition", DATATYPE_INTEGER, true, null, "0", "65535", true, true);
        addAttribute("ImageDescriptor", "imageWidth", DATATYPE_INTEGER, true, null, "1", "65535", true, true);
        addAttribute("ImageDescriptor", "imageHeight", DATATYPE_INTEGER, true, null, "1", "65535", true, true);
        addBooleanAttribute("ImageDescriptor", "interlaceFlag", false, false);

        // root -> LocalColorTable
        addElement("LocalColorTable", GIFImageMetadata.nativeMetadataFormatName, 2, 256);
        addAttribute("LocalColorTable", "sizeOfLocalColorTable", DATATYPE_INTEGER, true, null, Arrays.asList(GIFStreamMetadata.colorTableSizes));
        addBooleanAttribute("LocalColorTable", "sortFlag", false, false);

        // root -> LocalColorTable -> ColorTableEntry
        addElement("ColorTableEntry", "LocalColorTable", CHILD_POLICY_EMPTY);
        addAttribute("ColorTableEntry", "index", DATATYPE_INTEGER, true, null, "0", "255", true, true);
        addAttribute("ColorTableEntry", "red", DATATYPE_INTEGER, true, null, "0", "255", true, true);
        addAttribute("ColorTableEntry", "green", DATATYPE_INTEGER, true, null, "0", "255", true, true);
        addAttribute("ColorTableEntry", "blue", DATATYPE_INTEGER, true, null, "0", "255", true, true);

        // root -> GraphicControlExtension
        addElement("GraphicControlExtension", GIFImageMetadata.nativeMetadataFormatName, CHILD_POLICY_EMPTY);
        addAttribute("GraphicControlExtension", "disposalMethod", DATATYPE_STRING, true, null, Arrays.asList(GIFImageMetadata.disposalMethodNames));
        addBooleanAttribute("GraphicControlExtension", "userInputFlag", false, false);
        addBooleanAttribute("GraphicControlExtension", "transparentColorFlag", false, false);
        addAttribute("GraphicControlExtension", "delayTime", DATATYPE_INTEGER, true, null, "0", "65535", true, true);
        addAttribute("GraphicControlExtension", "transparentColorIndex", DATATYPE_INTEGER, true, null, "0", "255", true, true);

        // root -> PlainTextExtension
        addElement("PlainTextExtension", GIFImageMetadata.nativeMetadataFormatName, CHILD_POLICY_EMPTY);
        addAttribute("PlainTextExtension", "textGridLeft", DATATYPE_INTEGER, true, null, "0", "65535", true, true);
        addAttribute("PlainTextExtension", "textGridTop", DATATYPE_INTEGER, true, null, "0", "65535", true, true);
        addAttribute("PlainTextExtension", "textGridWidth", DATATYPE_INTEGER, true, null, "1", "65535", true, true);
        addAttribute("PlainTextExtension", "textGridHeight", DATATYPE_INTEGER, true, null, "1", "65535", true, true);
        addAttribute("PlainTextExtension", "characterCellWidth", DATATYPE_INTEGER, true, null, "1", "65535", true, true);
        addAttribute("PlainTextExtension", "characterCellHeight", DATATYPE_INTEGER, true, null, "1", "65535", true, true);
        addAttribute("PlainTextExtension", "textForegroundColor", DATATYPE_INTEGER, true, null, "0", "255", true, true);
        addAttribute("PlainTextExtension", "textBackgroundColor", DATATYPE_INTEGER, true, null, "0", "255", true, true);

        // root -> ApplicationExtensions
        addElement("ApplicationExtensions", GIFImageMetadata.nativeMetadataFormatName, 1, Integer.MAX_VALUE);

        // root -> ApplicationExtensions -> ApplicationExtension
        addElement("ApplicationExtension", "ApplicationExtensions", CHILD_POLICY_EMPTY);
        addAttribute("ApplicationExtension", "applicationID", DATATYPE_STRING, true, null);
        addAttribute("ApplicationExtension", "authenticationCode", DATATYPE_STRING, true, null);
        addObjectValue("ApplicationExtension", byte.class, 0, Integer.MAX_VALUE);

        // root -> CommentExtensions
        addElement("CommentExtensions", GIFImageMetadata.nativeMetadataFormatName, 1, Integer.MAX_VALUE);

        // root -> CommentExtensions -> CommentExtension
        addElement("CommentExtension", "CommentExtensions", CHILD_POLICY_EMPTY);
        addAttribute("CommentExtension", "value", DATATYPE_STRING, true, null);
    }

    public boolean canNodeAppear(String elementName, ImageTypeSpecifier imageType) {
        return true;
    }

    public static synchronized IIOMetadataFormat getInstance() {
        if (instance == null) {
            instance = new GIFImageMetadataFormat();
        }
        return instance;
    }
}
